This subsection shall supersede and preempt any local ordinances or regulations, including any ordinances or regulations enacted by any political subdivision of the state, regarding the disposal of unused controlled substances. For the purposes of this section, the term "ultimate user" shall mean a person who has lawfully obtained and possesses a controlled substance for his or her own use or for the use of a member of his or her household or for an animal owned by him or her or a member of his or her household.
§ 195.265, RSMo